99902774634 has 64 divisors (see below), whose sum is σ = 227979722880. Its totient is φ = 28912435200.

The previous prime is 99902774633. The next prime is 99902774641. The reversal of 99902774634 is 43647720999.

It is not an unprimeable number, because it can be changed into a prime (99902774633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2099397 + ... + 2146455.

It is an arithmetic number, because the mean of its divisors is an integer number (3562183170).

Almost surely, 2^99902774634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99902774634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113989861440).

99902774634 is an abundant number, since it is smaller than the sum of its proper divisors (128076948246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99902774634 is a wasteful number, since it uses less digits than its factorization.

99902774634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48695.

The product of its (nonzero) digits is 20575296, while the sum is 60.

The spelling of 99902774634 in words is "ninety-nine billion, nine hundred two million, seven hundred seventy-four thousand, six hundred thirty-four".